Gauging tool



Od. 29, 1935. W. EDWARDS l 2,018,777

GAUGING TOOL Original Filed Feb. 5, 1931 Patented Oct. 29, 1935 UNITEDSTATES PATENT OFFICE GAUGING TOOL Frank W. Edwards, Chicago, Ill.,assignor to The Ohio Injector Company of Illinois, Chicago, Ill.,

a corporation of Illinois AOriginal application February 5, 1931, SerialNo. 513,706. Divided and this application June 27,

1934, Serial No. 732,739

3 Claims. (Cl. 33-181) .o' :closed-inmy'patentsas followsz-Terminalvalves -zforforce feed lnbricators, No. 1,808,978, dated June 9,1931;Lubrication assembly, No. 1,904,295, dated Api-i118, l'andiLubricationassembly for locomotives, No..1,917',19=1, dated July 4, 1933, andin115: gmyfpatent, '..with'Fordyce-B. Farnsworth, as joint `inventor, `forLubricators No. 1,886,659, dated .:Novembei-'8, 1932.

The object of the invention is to provide gauging tools-.whereby the?:accuracy of assembly and ad- `2l).- .justmentpthe efficiency and thelength of life of fsuclrzvalyesmayibe enhanced.

iInlthe valves forv use with which the tools of invention are adapted,there is a body provided withufluid inlet and outlet ports, one of same,usually the outlet port, carrying a valve .vseamandearrangedin thevalve-body is a pin valve 'andi.diaphragm. assembly held in adjustedposition by meansfof-abonnet which preferably houses .agspringforvariablyrapplying pressure to the dia- .ll:phragmfzandtothev-pin'valva It is for adjusting `thepinvalve:assembly-relatively to its seat in the value-belive that `the-tools= of the invention are particularly-'designed as will -beexplainedlmore :fully1 hereinafter and.y finally claimed.

35. In the accompanying drawing illustrating the invention, im theseveral -gures of which like .partaare similarly designated, Figure 1 isan axial v.settional.,elevation of avalveof. the type referred .tn.`Fig...2;is a sectional elevation showing the 4!!v1 valse body .and toolsfor.A gauging, the proper length .andi setting of' the pin valve and itsseat. .Eig..-3 is ,a sectional .elevation showing a further.gaugingoperation andthe tools therefor. Fig. 4 'is ga.; sectional'elevationvshowing the gauging of Al the length` ofthe pin valve asdetermined by the operationsv illustrated in Figs. 2 and 3.

Y The-valve -hasa bodyr I` and a bonnet 2. The "body-I1 is providedYYwith one or more inlet openings-orports @and an outlet opening or port4,

'50-and-all-o' these openings communicate with a pressure chamber. 5*within: the body and are adaptedfor'connectionwith pipes or otherconv'cluitsslbsr means of: screwthreaded or otherwise .Iappropriantely.Ytreated connecting bosses 6 and I The body is counterbored` to providean annular shoulder or seat 8 and is screwthreaded above this seat toreceive the complementally screwthreaded shank 9r of the bonnet 2. Uponthe` seat 9 rests the diaphragm I0, preferably of the multi- '15 plateat type, and it is held pressure tight against this seat by a retainingring II against which bears the end of the screwthreaded shank 9.

Supported by the diaphragm lllis the pin valve assembly. This assemblycomprises a .pin valve I0:

`retainer I2 having a topv recess lil and a screwthreaded bore I4, aslip washer I5, a tubular diaphragm retaining member I 6 screwed intothebore I4 and xedly uniting the diaphragm i0 and pin valve retainer l2,a pin valve having a head I'I lli seating in the top recess I3 of theretainer I2 and a shank I8 passing through the member vI6 and pointed atits end as indicated at I9', and a thrust cap interiorly screwthreadedto engage the screwthreaded exterior 2l of the'retainer' |12. 20

The pin valve retainer I2 and the diaphragm retainingmember i6 areprovided with non-cylindrical, preferably hexagonal lportions 22 and 23,respectively, whereby wrenches may be applied to them for effectingtheir assembly on the diaphragm I0, and the thrust'cap 20 isiprovidedwith flattened surfaces, ask indicatedA at 24 for a similar purpose.

A seat member 25 for the pinV valve is threaded into the valve body Iand'has an axial'passage-ZB 30 so formed at its upper end as to providea proper seat 2'I for the poitedend I9 ofthe pin valve. This passage 26is preferably in axial'alinement with the outlet port'4 and communicatestherewith. Suiiicient lateral clearance is provided in the recess 'I9andA in the borey of the diaphragm retaining member l6'to permit thepointed end=|9 of the pin valve to properlyregister with its seat 21 inthe seat member 25.

Obviously, the diaphragm Illwill normally hold 40 the pin valve seatedand the check valve thus closed, but in order that pressures in excessof those which may be withstood by the" diaphragm may be handled by thecheck valve, the diaphragm is loaded by means of a compression spring 2845 which seats upon the thrust cap 20 at one end and against an'adjustable plug 29 at the other end. This plug 29 is screwthreadedintothe upper end of the tubular bonnet 2r and may bexed in adjustedposition by means of a lock cap 30. By these means the check valve maybe adjusted for operation at any pressureof a range of pressuresdetermined by the stiiness of the diaphragm I0 and the stiffness of thespring 2li-and its-:adjustmentby means of the plug 29.

simplyby removing the thrust cap 20.

In order that no dashpot eiect may be produced within'the bonnet 2,openings 3| may be provided therein and, in addition, the plug 29 may bebored, as indicated at 32, and the cap 3U provided with a vent 33.

The diaphragm retaining ring II and the pin valve retainer I2 have theirdiaphragm contacting faces so shaped, as by bevelling, as indicated at34 and 35, respectively, that upon flexure of the diaphragm I under theinfluence of pressure in chamber 5 there will be no tendency to shearthe diaphragm between the edges of the members I I and I2. Furthermore,upward flexure of the diaphragm is limited by stops 35 carried by thebonnet 2 and projecting into the path of movement of the thrust cap 2U,with the top surface of which they are adapted to engage.

In valves of this general type as heretofore constructed, wherein theoperating parts, particularly the pin valve and diaphragm assembly areenclosed and concealed when assembled in the body, it is difiicult todetermine whether or not the pin valve seats properly. This isparticularly true in case replacements and repairs are necessary.

In valves constructed as just described in accordance with the inventionspeciiically covered by my copending application Serial No. 513,706,referred to, this uncertainty is removed, and tools of this invention,as hereinafter particularly described, may be used to properly gauge theparts and insure their proper assembly and functioning.

It will be noted that when the pin valve and diaphragm assembly isproperly made, as shown in Fig. 1, there can be no relative axialmovement between the parts, particularly as regards movement between thepin valve I8 and its retainer I2.

'This latter is due to the fact that the head I1 of the pin valve is ofsuch a length as to snugly iit between the bottom of the recess I3 andthe face of the thrust cap 20, both of which contact with it.Consequently when the assembly is properly fixed in the body I, with theseat member 25 in adjusted position, the distance between the bottom ofthe recess I3 and the seat 21 will remain constant so long as adiaphragm of a given thickness is used. If the thickness of thediaphragm is changed, this distance will be changed, but the change inlength of pin valve may be accurately determined and a suitable pinvalve supplied by gauging the distance from the seat 21 to the bottom ofrecess I3.

It will be noted, further, that the pin valve may be removed withoutdisturbing the diaphragm, Thus, if necessary, the distance referred tomay be gauged if, when otherwise properly adjusted, the valve fails toopen when it should, vor opens when it should not, or leaks. l

In short, the only movement which can occur between the point I9 of thepin valve and its seat 21 is a movement dependent upon the diaphragm,whether due to pressure in chamber 5, as is desired, or due tosubstitution of a diaphragm of a thickness different lfrom that forwhich the pin valve was originally fitted, and the latter may be gauged.

In Fig. 2 is shown a valve body I, like that shown in Fig. 1, providedwith a seat member 25 in gauging the length of pin valve necessary forcooperation therewith when a diaphragm of pre-- determined thickness isto be used. Or, conversely, when a pin valve of predetermined length isto be used, the thickness of diaphragm necessary or the adjustment ofthe seat member 25 may be determined by use of these tools. However, asthe proper operation of the valve is largely dependent upon the numberof laminas of the diaphragm, and hence its stiffness, and as the seatmember 25 should be screwed down hard into iixed 5 relation to the body,it is usuallythe length of the pin valve which is changed to suit'thediaphragm and seat member.

The tools shown in Fig. 2, include a false diaphragm piece 31 of rigidplate form, machined 10 at its edge 38 to a thickness simulating that ofthe diaphragm to be used, (a number of these having edges of differentthicknesses may be furnished) a retainer disk 39 having a central lug4I), a gauge sleeve 4I, and a gauge rod 42 having one end 43 15 pointedin the same manner as a pin valve and its other end provided with a heador finger piece 44. The gauge sleeve 4I is provided with a set screw 45by which its adjustment relatively to the gauge rod 42 may be xed, andhas a reduced portion 46 at one end for -a purpose later explained.These tools, particularly the'false diaphragm 31 and retainer disk 39are primarily adapted ior'the tting up of new valves at the factory, butthe gauge sleeve 4I and gauge rod 42 may be used in 25 tting pin valvesand diaphragms for replacement and repair.

As hereinbefore stated, the several false diaphragm pieces 31 providedmay have edges 38 of thicknesses to simulate diaphragms of variousthicknesses or numbers of laminas, and although Fig. 1 shows a diaphragmof three laminae, Fig. 2, for the sake of variety, shows a falsediaphragm pjece having an edge of the thickness of a twolaminadiaphragm. Thus the pin valve as shown in Fig. 4 is shorter than thatshown in Fig. l1 because it is of a length to fit the installationgauged by Fig. 2. ,v

The thickness of the retainer disk 39 from its bottom surface to the topsurface of the lug 40 is 46 the same as the distance from the lower faceof the pin valve retainer I2 in lcontact withthe diaphragm to thesurface of the bottom of the recess I3 therein. Thus the combinedthicknesses of the machined edge of the false di- '5 aphragm piece andthe retainer disk is equal always to the distance between the bottom ofthe recess I3 of the retainer I2 and the seat 8 of body I when adiaphragm I0 of which the false diaphragm piece 31 is a counterpart isused. This 50 being the case, it will be apparent that by measuring fromthe seat 21 to the top surface of the lug 4I! the length of the shank I8of the pin valve suitable for the particular installation will beascertained. 55

With the false diaphragm piece 31 and retainer disk 39 properlypositioned in the body and rest- `ing upon the diaphragm seat 8thereoL'a false 'slidable relatively to gauge sleeve 4Il is passedthrough the holes 48 and 49 in the piece `31 and disk 39, respectively,and is seated with its pointed end 43 in the seat 21 of the seat member25. 'Ihen the reduced portion 46 of the sleeve 4I is so ad- 65 justedupon the gauge rod that its end is permitted to contact with or seatupon the upper surface of the lug 40 of disk 39, and set screw 45 istightened to hold the rod and sleeve in the adjustment thus im obtained.Considering the just preceding descriptive matter, it will be apparentthat the measurement thus taken gives the proper length for a pin valveto be used in installations requiring a two-lamina diaphragm. Other pinvalve lengths g may be ascertained by substituting other false diaphragmpieces of different thicknesses.

Referring now to Fig. 3, it will be seen that the measurement justobtained may be transferred to a gauge block 50 having an interior bore5I in which is arranged a micrometer screw 52 the 4end of which isshaped to receive the pointed end 43 of the gauge rod 42. With thereduced end 4t of the sleeve 4I at the topof the gauge block and thepointed end of the gauge rod 42 extending into its bore 5E, themicrometer screw is run in or backed o-i until the end 46 of the sleevejust seats upon the top of the gauge block, proper positioning of thepointed end 43 in the screw 52 being meanwhile observed through anopening 53 in the block. The set screw 54 is then tightened to maintainthe proper setting of the micrometer screw 52.

With the established measurement thus transferred to the gauge block 50,it will be apparent that when the pin valves are made they may be testedfor length of shank in the gauge block, as shown in Fig. 4, and anydiscrepancy as to length accurately determined.

It is, of course, desirable to test the actual installations ofdiaphragms and pin valve retainers to see that the pin valves will fitthem and to ascertain what, if any, changes are required, and it isnecessary to make similar gauge tests when repairs and/or replacementsare necessary, and it is for accommodating the gauge sleeve 4I to thisuse that its lower end is reduced at 46, the reduced portion being ofsuch a diameter and length that it will t easily within the recess I3 ofthe pin valve retainer l2 and seat against the bottom of such recess.

Various changes other than and in addition to those specificallyreferred to are contemplated as within the spirit of the invention andthe scope of the following claims.

What I claim is:-

1. Gauging tools for measuring the length of a headed pin valve forminga part of a pressure operated valve having a valve body, a diaphragm, apin valve retainer having a rest for the lower surface of the pin valvehead, and a pin valve seat, said tools including a false diaphragm piececorresponding to said diaphragm in edge thickness, a retainer disksimulating said pin valve retainer and having an upper exposed surfacespaced from said false diaphragm piece a distance equal to the distancebetween the rest and the diaphragm, a gauge rod and a gauge sleeve. saiddiaphragm piece and said retainer disk provided with openings andadapted to be assembled in said body with said openings in axialalinement with said pin valve seat, said gauge rod adapted to be passedthrough said openings'into engagement with said seat, and said gaugesleeve adapted to be engaged with the upper exposed surface of saidretainer disk and secured to said rod to gauge the distance from thesleeve-engaged surface o1 said retainer disk to said pin valve seat.

2. Gauging tools for measuring the length of a headed pin valve forming.a part of a pressure operated valve having a valve body, a diaphragm, apin valve retainer having a rest for the lower surface of the pin valvehead, and a pin valve seat, said tools including a false diaphragm piececorresponding to said diaphragm in edge thickness, a retainer disksimulating said pin valve retainer and having an upper exposed surfacespaced from said false diaphragm piece a distance equal to. the distancebetween the rest and the diaphragm, a gauge rod similar to the pin valveand having a similar pointed end and a gauge sleeve, said diaphragmpiece and said retainer disk provided with openings and adapted to beassembled in said body with said openings in axial alinement with saidpin valve seat, said gauge rod adapted to be passed through saidopenings so that its pointed end is brought into engagement with theupper exposed surface of and seated in said seat, and said gauge sleeveadapted to be engaged with said retainer disk and secured to said rod togauge the distance from the sleeve-engaged surface of said retainer diskto said pin valve seat.

3. Gauging tools for measuring the length of a headed pin valve forminga part of a pressure operated valve having a pin valve retainer recessedto receive the head of the pin valve and providing in said recess a restfor the lower surface of the pin valve head, said tools including agauge rod and a gauge sleeve, said rod having characteristics similar tothose of said pin valve and adapted to be inserted in said retainer'inplace of same, and said sleeve provided at one extremity with a reducedportion adapted to enter the recess of said retainer, the end of saidreduced portion adapted to contact with said rest.

FRANK W. EDWARDS.

